100 AKATOJIICAL TECHNOLOGY. 



Thorax— ThQ chest.— Fig. 30, 77. 



VertebrcB lumbales— The lumbar vertebrae, with their diapo- 

 physes and zygapophyes.— Fig. 30, 51, 55. 



XipMsternuTTir—Ths, ensiform cartilage of the sternum.— Fig. 

 30, 49. 



§ 237. Operation.— Place the cat dorsicnmbent, the head to the 

 left. Pinch up the right abdominal parietes about midway be- 

 tween the crista ilii and the last rib. 



With the arthrotome, transfix the fold so pinched up, and cut 

 ento-ectad to the surface. If only the skin is divided at the first 

 attempt, pinch up the muscles and repeat the transfixion, but be 

 careful not to include any of the intestines within the fold. 



Into the incision so made, insert the left index and medius, the 

 hand being supinated, and lift the parietes away from the viscera. 

 Introduce the scalpel, with the edge directed ectad, and divide the 

 parietes on each side untU the thicker vertebral muscles are reached 

 a few centimeters from the dorsimeson. The dorsal ends of this 

 transverse incision should be just caudad of the Mdneys. 



About 3 cm. sinistrad of the ventrimeson, divide the parietes 

 longitudinally to the pelvis and the epigastrium, making sure not 

 to cut the xipMsternum or costicartilages. 



Turn aside the four rectangular flaps so formed, and draw the 

 intestines caudad. Introduce the pronated left hand between the 

 liver and the parietes until the fingers are met by the diaphragm. 

 Partly flex the fingers, and push them somewhat dorsad ; then draw 

 the liver and stomach caudad ; this will expose the Tendo centralis 

 of the diaphragm, which should be punctured with the tracer. The 

 admission of air into the thorax will permit the farther caudiduction 

 of the liver and stomach. 



§ 338. If the cepTialic part is to be preserved, ligate the rectum and then the stomach 

 and liver, and inject 84-95 per cent, alcohol into the aorta, as directed in § 385. After two 

 hours a plaster injection may be made if desired. Then proceed as in § 339. 



If the parts are to be dissected fresh, or if the muscles are to be exposed and the thorax 

 opened so soon as to render the alcohol injection unnecessary, proceed as in § 339. 



§ 239. Insert the curved scissors, keeping the convexity toward 

 the diaphragm, and divide the Ligamentum suspensorium of the 

 liver, the postcava and the abdominal oesophagus ; while so doing, 

 the viscera should be drawn ventrad as weU as caudad, so as to put 

 the parts named upon the stretch. 



